Peteps



2 Sheets-Sheet 1.

(No Model.)

G. L. ADAMS.

PRINTING PRESS.

N0; 276,207. Patgnted Apr. 24,1883.

iii;

(No Model.) 28heets-Sheet I G. L. ADAMS.

PRINTING PRESS.

No. 276,207. Patented t-24,1883.

' J'. a M C 3 E K i J WITNESSES: INVENTOR'.

UNITED STATES PATENT, OFFICE.

QNE-HALF TO JOHN G. ELLSWORTH, OF SAME PLACE.

'PRlNTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 276,207, dated April 24, 1883.

Application filed April 26, 1882. (N0 model.)

To allwhom it may concern Be it known that L-Gnonen L. ADAMS, of Fowlerville, in the county of Livingston and State of Michigan, have invented new and useful ImprovementsinPrinting-Presses; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

The nature of this invention relates to certainhew and useful improvements in theconstruction of hand printing presses, by means of which the same are very much simplified in construction, cheapened in cost, and rendered very easy tooperate.

The invention consists in the peculiar arrangement of devices for readily and 1 easily controlling the position of the impression-cylinder, and in the peculiar construction and combination of parts, as more fully hereinafter described.

Figure l is a perspective of my improvedpress. Fig. 2 is a detail, and Fig. 3 is a sectional elevation thereof.

In the accompanying drawings, A A represent a pair of ways or ribs supported parallel to each other upon any suitable supports or standards. The ribs A and A, upontheir upper surfaces, are V-shaped in cross section, and it is preferable that both these ribs be provided with parallel projecting flanges a, to prevent the oil used in lubrication from escapingto the floor below. Across and underneath these ribs is suitably journaled the shaft 0, upon which, between said ribs, is secured a pulley, B, to which are secured straps b or other devices, the opposite ends of which are secured to the bed D, of the press, so that in the rotation ofthe shaft in one direction the bed is driven toward one end of the ribs, and

[ ies of which rollers have V-shaped grooves, to engage with and travel upon the V-shaped ribs A A, which act as guides. ports at the forward ends of the ribs, and within the upper parts of these supports are sliding boxes G, in which run the journals of the impression-roller H. These boxes are vertically adjustable by means of the set-screws I above and below. Between the top of these boxes and the standards which support them are springs 0, designed by their own. tension to force said roller downward, aiding its own upon the form upon the bed of the press as said form passes under said roller. bed of the press, containing the form, is projected underneath said roller, the roller should occupy a position sufficiently above to allow said form to pass without obstruction but the moment the reverse motion of thebed commences the weight of the roller, assisted by the springs above it, should be thrown upon accomplish this end I pivot the lever J to one side of the rib A, as represented in Fig. 3, or to any other convenient place, by a bracket, as shown in Figs. 1 and 2. To the under side of this lever I hinge or otherwise suitably secure the link L, the free end of which connects to one end of a lever, K, pivoted to an arm below the ribs A A, the opposite end of said lever K being connected to a yoke, M, Whose ends are connected with the lower ends of the boxes G, in which the impression-roller rotates.

In practice, as the pressman grasps with his left hand the crank by which the bed is propelled, with his right hand he throws down the tympan upon the form, and as this latter movement is completed his hand drops off the tympan onto the free end of the lever J, and, bearing down upon the same with sufficient force, raises the impression-roller through the system of leverage described, and allows the bed to pass freely in the forward direction under the action of the shaft. Before or at the time the return or reverse movement of the bed takes place the operator should release the lever, when the gravity of the roller, assisted by the action of the springs above it,

gravity in producing the necessary impression As thethe form to obtain the desiredimpression. To

will throw it down sutliciently far so that as such reverse motion takes place the proper impression, will be had.

' When it is desired to suddenly increase the pressure extended by the roller, the operator can at any time add to the downward action of the roller and springs by raising the lever instead of releasing it. The yoke M, being solid and provided with the arm M, placed as near its center as the mechanical exigencies of the case will permit, is rendered capable of exerting considerable force equally upon both the boxes and from them upon the roller, whether for raising or lowering the same.

What I claim as my invention is In a hand printing-press, the three-armed GEORGE L. ADAMS.

In presence of- H. S. SPRAGUE, E. SOULLY. 

